hi my english is no good i use fuser fron one laser printer to tranfer pcb layout to blank pcb use regular papel and coater papel it work bery good and fine i...
... Damn, well there goes that idea out the window. Was this the one you got ? http://www.quickgrow.com/images_shop/aqua_fizz_12.gif I spent some time looking...
Yip, that's the one. I asked the clerk what it was made of but she didn't have a clue (or seem likely to get one anytimew soon, either). I thought I would just...
I once tried pin holes in PVC tube, but the bubbles always come out big compared to air stones. I think they air needs to pass through all those small cavities...
It looks like the Sweetwater air diffusers might be best for the job, in that they last forever in an acidic environment, according to the manufacturer. There...
That URL shows some good stuff on air "sparging". The porous hose is probably just fine for the job. As you say, the ceramic blocks (fine bubble version) are...
Even though my tank of etchant is far from the deep green color which shows it is at an optimum, I decided to etch a small board tonight. I hung it in the...
Thanks for the update. What you describe about the gray film on the copper surface during etching is very important discovery. The film is copper(I) chloride...
I was thinking that it might be possible to arrange a several turn spiral of flexible tubing submerged about 90 percent ( a slow spiral ramp) slide a smaller...
I have experienced uneven etching using CuCl too. I etch my boards horizontally facing up, and the etching happens from the edge to the center of the board,...
Even the Ferric Chloride etchant will etch unevenly and take some time in cold etchant. Is CuCl the same? I have always heated the Ferric but am wondering if...
Hello to all... New member here and not real knowledgeable regarding PCBs but am hoping to learn. If you guys can stand a few "neophyte" type questions for a...
Monte, CadSoft has a free version of their Eagle PCB program available at their website http://www.cadsoft.de/freeware.htm This will allow you to make...
Check out Eagle at http://www.cadsoft.de . The freebie version is limited to something like 4" x 4" (or thereabouts) and 2 layers, but is very fully capable...
One of the variables affecting etch time in CuCl is etchant temperature. However, you have to be careful not to melt or soften your etchant tank. And, the...
Check out autotrax. Pretty powerfull and - belive it or not - completely free! http://www.autotraxeda.com/ Note, I don't know the package in detail cause I...
Hi, I hope I'm not re-asking a worn out question... but here goes. What is the best tool to use to route printed circuit boards on an NC mill? I have a...
Hi Bob- I am not an expert on this, and I have no direct experience. I do know that John Kleinbauer, who designs and sells plans for home built CNC machines...
In a message dated 5/7/2003 6:36:46 AM Central Standard Time, ... Bob: I have been reading mail from latest-received, on, so I just got to your good question:...
Bob, We always used "diamond cut fishtail" router bits for profiling boards on Excellon Automation CNC routers. Almost every job was routed using .093"...
... -snip- ... catalogs, but ... have on ... catalogs of ... have ... Don't forget to check the Links section of the list, and if you have a good supplier...
the scratch and etch is a very nice idea. knows anyone how i may obtain a plotter file (hpgl1) which contains the information needed to plot the outline of a...
Carbide will last a lot longer and give you better results (definition). It is more expensive than tool steel, but in the long run, it will be less expensive...
Hi everyone, I’m new here, I’ve been working with PCB’s for a while and now I want to start making my own boards for a great number of reasons. I found...
How this is done depends on a number of factors. The easiest way is to just put some wire through the holes and solder it on the top and bottom layer. Aside of...
There is one other method I've heard of, which is to use small "eyelets" that look like little open cylinders with flanged ends. There is a special tool ...
In a message dated 5/9/2003 6:39:23 PM Central Standard Time, m.zingg@... ... Markus! Please let us know what those "right chemicals" are, and how to apply...
i have seen them also. (neil's) these cylinders look like pop rivets, but thinner wall (and of course no shaft). you simply apply them by tining one side of...
